it is a good choice.
Since I don't know the power of your kite I would also concider a smaller board.
It really isn't much of a difference switching to a Twintip of maller size.
A 151 or 144 board would do as well.
If it has the right curve, it will work with not too much power as well.
Depending on how good you ride and if you like the style, I wouldn't waste time on a directional anymore. You will improve so fast using a good twintip.
Will you be at the masters in Miami?
If not, come down and we ride for a while and I show you how good these types of boards ride and even for a little bit advanced rider it is now problem to ride on it.